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光质对香果树种子萌发及幼苗生长影响的研究

花匠小妙招
2024-11-20 06:39

摘要： 研究了光质对香果树种子萌发及幼苗生长的影响。设置940 nm（远红光）、850 nm（远红光）、730 nm（远红光）、630 nm（红光）、610 nm（橙光）、590 nm（黄光）、525 nm（绿光）、460 nm（蓝光）8个光质处理及自然光对照，研究其种子萌发对光质的响应，设置730、630、610、590、525和460 nm六个光质处理，研究其幼苗生长对光质的响应。结果表明，940及850 nm下无种子萌发，730 nm处理下萌发率仅为1.33%。525 nm下香果树种子萌发率显著高于其他处理及自然光对照，自然光下与630、590 nm下香果树种子最终萌发率无显著差异。可见光中，460及610 nm下香果树种子最终萌发率显著低于其他处理；实验120 d时香果树幼苗干重为590 nm > 630 nm > 610 nm > 730 nm > 525 nm > 460 nm。120 d时，590 nm下香果树幼苗干重显著高于其他光质处理。香果树幼苗的相对质量增长速率，在30~90 d间630 nm显著高于其他处理，在90~120 d间590 nm下显著高于其他处理，在120~150及150~180 d间460 nm下显著高于其他处理。实验30 d时，根重比在0.17~0.25，处理间无显著差异，150 d时，460 nm下根重比显著高于其他处理。实验30 d时，730 nm下茎重比显著高于其他处理。实验30 d时，各处理香果树叶重比在0.53~0.68，处理间无显著差异。

关键词: 光质, 香果树, 种子萌发, 幼苗生长, 珍稀濒危植物

Abstract: We studied the effect of light quality on seed germination and seedling growth of the endangered plant Emmenopterys henryi by setting eight light quality treatments including the 940 nm(far red), 850 nm(far red), 730 nm(far red), 630 nm(red), 610 nm(orange), 590 nm(yellow), 525 nm(green), 460 nm(blue) and a nature light as CK, and setting six light quality treatment include 730, 630, 610, 590, 525 and 460 nm, respectively. The results showed that no seed germinate under 940 and 850 nm, and only 1.33% seeds germinate under 730 nm. The germination percent under 525 nm was significantly higher than that under other treatments include natural light control, and there was no significant difference between the final germination percent under natural light and that under 610 and 590 nm. The final germination rate under 460 and 610 nm was significantly lower than that of other treatments. At 120 d, the dry weight of the seedlings was 590 nm > 630 nm > 610 nm > 730 nm > 525 nm > 460 nm. At 120 d, the dry weight of the seedlings under 590 nm was significantly higher than that under other light treatments. The relative growth rate under 630 nm was significantly higher than that of other treatments between 30-90 d, and that under 590 nm was significantly higher than that of other treatments between 90-120 d. It was significantly higher than other treatments at 460 nm between 120-150 and 150-180 d. Root mass ratio was between 0.17-0.25 on the 30th day of treatment, and with no significant difference between treatments. Root mass ratio under 460 nm was significantly higher than that of other treatments on the 30th day of treatment. At 30 d, stem mass ratio under 730 nm was significantly higher than that of other treatments. Leaf mass ratio in each treatment was between 0.53-0.68 on the 30th day of treatment, and there was no significant difference between the treatments.

Key words: light quality, Emmenopterys henryi, seed germination, seedling growth, rare and endangered plants

中图分类号:

Q949.781.1